Microstructure Modeling of a Ni-Fe-Based Superalloy During the Rotary Forging Process

Loyda, A.; Hernández-Muñoz, Guadalupe Maribel; Reyes, Luis A.; Zambrano‐Robledo, Patricia del Carmen

doi:10.1007/s11665-016-2104-6

Cited by 33 publications

(8 citation statements)

References 33 publications

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“…Ni-Fe-Cr-base superalloys, which have the preferred physical, mechanical, and anti-corrosion properties, are widely applied in nuclear and aerospace industries [1,2]. The preferred properties of Ni-Fe-Cr-base superalloys are highly related to the hot forming processes [3,4].…”

Section: Introductionmentioning

confidence: 99%

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

120

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Section: Introductionmentioning

confidence: 99%

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

120

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“…Consequently, the forging temperature chosen is fairly crucial and need to be scientifically determined. During past years, simulationhas been developed as a powerful tool in designing a forging process. Physical simulation was employed to examine the distribution of Mises stress during compressing a nickel‐based superalloy Buckingham et al combined the Deform 3D simulation and experiment to establish the effect of strain distribution on microstructural developments during forging a nickel‐base superalloy .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Forging Cracks during Hot Compression of Powder Metallurgy Nickel‐Based Superalloy on Simulation and Experiment

Liu

Huang

et al. 2016

Adv Eng Mater

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Hot compression tests on a newly designed hot extrusion Nickel-based powder metallurgy superalloy are conducted at various deformation conditions. The contact friction coefficient (f) between the die and forged part is determined as 0.30-0.40 by analyzing the results of simulation and the real experiment. A new coefficient B is introduced to evaluate the bulging levels and relate the value of f. The critical strains to prevent peripheral cracks are found to relate closely to the processing parameters. Thermally induced porosity and MC type carbides of grain boundaries are the primary mechanism for inducing cracks. Examinations on microstructure of cracking demonstrate that the cracks propagate along grain boundaries. A model is proposed to illustrate the formation of fractures during hot forging.

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“…Avrami model parameters are listed in Table 1. These parameters are obtained from both DEFORM default settings and Huang et al [16], Reyes et al [17], and Loyda et al [18].…”

Section: Mechanically and Thermally Induced Recrystallization Modelmentioning

confidence: 99%

Microstructure-sensitive flow stress modeling for force prediction in laser assisted milling of Inconel 718

Pan

Feng

et al. 2017

Manufacturing Rev.

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-Inconel 718 is a typical hard-to-machine material that requires thermally enhanced machining technology such as laser-assisted milling. Based upon finite element analysis, this study simulates the forces in the laser-assisted milling process of Inconel 718 considering the effects of grain growth due to c 0 and c 00 phases. The c 00 phase is unstable and becomes the d phase, which is likely to precipitate at a temperature over 750°C. The temperature around the center of spot in the experiments is 850°C, so the phase transformation and grain growth happen throughout the milling process. In the analysis, this study includes the microstructure evolution while accounting for the effects of dynamic recrystallization and grain growth through the Avrami model. The grain growth reduces the yield stress and flow stress, which improves the machinability. In finite element analysis (FEA), several boundary conditions of temperature varying with time are defined to simulate the movement of laser spot, and the constitutive model is described by Johnson-Cook equation. In experiments, this study collects three sets of cutting forces and finds that the predicted values are in close agreements with measurements especially in feed direction, in which the smallest error is around 5%. In another three simulations, this study also examines the effect of laser preheating on the cutting forces by comparison with a traditional milling process without laser assist. When the laser is off, the forces increase in all cases, which prove the softening effect of laser-assisted milling. In addition, when the axial depth of milling increases, the laser has a more significant influence, especially in axial direction, in which the force with laser is more than 18% smaller than the one without laser. Overall, this study validates the influence of laser-assisted milling on Inconel 718 by predicting the cutting forces in FEA.

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Microstructure Modeling of a Ni-Fe-Based Superalloy During the Rotary Forging Process

Cited by 33 publications

References 33 publications

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Analysis of Forging Cracks during Hot Compression of Powder Metallurgy Nickel‐Based Superalloy on Simulation and Experiment

Microstructure-sensitive flow stress modeling for force prediction in laser assisted milling of Inconel 718

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